This tool can be used to extract the NAND file from a emuNAND SD card and to inject a NAND file into the emuNAND SD card.

Supported emuNANDs: Gateway, R4i (and clones like 3DS Link), MT Card
The emuNAND SD gets detected automatically!
To inject a NAND file, the SD card has to already contain an emuNAND partition.
The extracted NAND file is also flashable to the 3DS.

Usage examples:
- You updated your emuNAND to a version which is not supported by the Gateway (or clone) and want to go back to an old version.
=> Extract the emuNAND each time you update it. You can then switch the emuNAND version by injecting the backup.

- Your emuNAND is on the latest version, but the Gateway (or clone) does not support the eshop of this system version yet,but you want to buy a game.
=> Extract emuNAND, flash extracted emuNAND to 3DS, open the eshop and buy a game, backup the 3DS NAND, flash your 4.X NAND back onto the 3DS, inject the new 3DS NAND backup (with the downloaded game) into the emuNAND SD.
(ATTENTION: make sure you have a valid 4.X NAND backup and are able to flash it back with hardware!)

- You updated your emuNAND to a version which is not supported by the Gateway (or clone) and want to go back to an old version. But you don't have a backup.
=> Update your 3DS NAND by using a game card, create a backup of the 3DS NAND, flash your 4.X NAND backup back to the 3DS and inject the updated NAND backup to the emuNAND SD.
(ATTENTION: make sure you have a valid 4.X NAND backup and are able to flash it back with hardware!)